P
Glossary
Proforma Invoice
A proforma invoice is a preliminary billing document a seller sends before a sale completes, itemizing the goods, quantities, prices, and terms the buyer can expect. The document commits nobody to payment, creates no receivable, and carries no number in the seller's invoice sequence.
Key Takeaways
HMRC's VATREC9020 manual says pro-forma invoices aren't acceptable evidence for reclaiming input tax, even when they show every field a VAT invoice would.
Once the issuer takes payment or makes the supply, UK rules give them 30 days to issue the full VAT invoice.
A proforma posts nothing to the ledger: no receivable, no tax point, no revenue recognized, which is why it needs no invoice number.
US customs accepts a pro forma invoice at entry under 19 CFR 141.85 against a bond of 1.5 times the invoice value, with the real invoice due inside 120 days.
A proforma differs from a quote by being itemized and near final, and from a draft invoice by facing the customer.
When do teams issue a proforma invoice?
Teams issue one when the buyer needs a document that looks like an invoice before there's anything legitimate to invoice. Their process demands paper, so the seller sends the right numbers with no legal status.
The situations that generate them:
Prepayment. The seller wants money before shipping, and the buyer won't release funds against an email.
Customs and export. A shipment needs a declared value before the commercial invoice exists.
Purchase orders. Procurement needs line-level figures to raise a PO, and no invoice exists until it comes back.
Budget approval. An internal approver signs off against documents, not quotes.
How it compares to its neighbours:
Proforma | Quote | Draft invoice | Commercial invoice | |
|---|---|---|---|---|
Seen by | Customer | Customer | Internal | Customer |
Message | You'll be billed | It could cost | We think you owe | You owe |
Amounts | Near final | Negotiable | Still moving | Locked |
Hits the ledger | No | No | No | Yes |
Tax reclaim | No | No | No | Yes |
The draft invoice is the one people mix it up with, and the difference is direction. A draft is the billing system holding amounts open while late usage settles.
What does a proforma invoice contain?
Nearly everything a commercial invoice carries, minus the sequential number and the tax-document status. The resemblance is the point: it works only if the approver reads it the way they read a real invoice.
The fields that belong on one:
The word "Proforma" in the title, plus "This is not a VAT invoice" under UK practice.
Seller and buyer names, addresses, and tax registration numbers.
An issue date and a validity date, since the prices expire.
Description, quantity, unit price, and amount for each invoice line item.
Currency, tax shown separately, shipping, and the total.
Expected terms, such as net 30 or payment in advance.
For cross-border goods, commodity codes, country of origin, and the Incoterms rule.
Two fields stay off deliberately. A proforma takes no number from the invoice sequence, because that sequence is an audit trail and a document that may never convert shouldn't consume one. It carries no enforceable due date either. Sellers who want a reference use a parallel series: PF-0001, not INV-0001.
Is a proforma invoice a legal or tax document?
It's neither, and the tax boundary is the sharper of the two. Authorities set their own rules, so check where you file, but the pattern holds: a tax claim rests on the document issued after the supply.
The UK position, in HMRC's own manuals:
VATREC9020 makes input tax entitlement conditional on a valid VAT invoice, and pro-forma invoices aren't acceptable evidence.
VATREC9010 says a pro-forma has no place in the books of account of either trader, the issuer or the recipient.
VATREC9030 names the failure mode: buyers claiming input tax twice, against the proforma and again against the VAT invoice behind it.
After payment or supply, the seller has 30 days to issue the VAT invoice that does carry the claim.
Legally, a proforma reads as an invitation rather than a contract, which is why sellers add a validity date and reserve the right to requote. Customs is the exception: under 19 CFR 141.91 a US importer with no commercial invoice files a pro forma under 19 CFR 141.85, posts a bond for 1.5 times the invoice value, and produces the real invoice within 120 days.
Related terms
A proforma only makes sense next to the documents it hands off to, so start with the neighbours that do carry ledger weight.
Draft invoice is the internal counterpart, held open while amounts settle.
Invoice line item is the unit of detail a proforma has to get right.
Unbilled AR covers revenue earned before any invoice exists, which a proforma doesn't change.
Net 30 payment terms run from the real invoice, never from the proforma.
E-invoicing mandate rules apply to the tax invoice, never to a proforma filed in its place.
FAQ
Can a customer pay against a proforma invoice?
Yes, and it happens constantly under prepayment terms. The payment is real even though the document isn't a tax invoice, and receiving it triggers the seller's obligation to issue the proper one.
Does a proforma invoice need an invoice number?
No, and taking one from the invoice sequence causes problems. Sequences run unbroken for audit purposes, and a proforma that never converts leaves a gap to explain.
Does issuing a proforma invoice count as a sale?
No. Nothing posts to accounts receivable and no revenue gets recognized. Recognition follows delivery and the transfer of control, and a document sent ahead of that changes neither.
Which document do customs officials want?
The commercial invoice, with the pro forma accepted only as a stopgap. In the US, 19 CFR 141.91 lets an importer enter goods on a pro forma backed by a bond, then requires the commercial invoice inside 120 days.
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